problem plotting u,v winds from binary file

[Brad Navarro]

Greetings,

 

Despite my persistent efforts, I cannot seem to solve this particular
problem. Perhaps someone out there will know how. I have generated a
binary file with U and V wind components for only one level and
timestamp, and I have provided the piece of code that writes this data
to file:

 

         DO 110 I=1,191

             write(16,rec=I) (Ux(I,J),J=1,360)  ! writes the u component
to file

  110    CONTINUE

 

         DO 115 I=1,191

          write(16,rec=I) (Vy(I,J),J=1,360) ! writes the v component to
file.

115        CONTINUE

 

So, in essence, each component is written for each latitude, I, and for
each longitude, J, at 1 degree intervals. So my control file then looks
like this:

 

DSET  /home/bradn/WINDVERIF/TEST/windcompgridded.dat

TITLE  Qscat 10m wind

UNDEF  -0.9999E4

XDEF 360 LINEAR 0 1

YDEF 181 LINEAR -90 1

ZDEF 1 LEVELS 1 1

TDEF 1 LINEAR 15Z17JUN07 3hr

VARS 2

 u 0 99 u component

 v 0 99 v component

ENDVARS

 

 

However, when trying to plot the U component, it looks as if GrADS uses
the V data in the binary file as the U data, and then gives me this
error message when trying to plot the V component:

 

Low Level I/O Error:  Read error on data file

  Data file name = /home/bradn/WINDVERIF/TEST/DIR/windcompgridded.dat

  Error reading 360 bytes at location 68760

Data Request Error:  Error for variable 'v'

  Error ocurred at column 1

DISPLAY error:  Invalid expression

  Expression = v

 

Anyone have any ideas what I might be doing wrong? Any help would be
much appreciated.

 

Thanks,

Brad

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